The average red blood cell lives for about ________ days

A) 100 B) 150 C) 120 D) 90


C

Biology & Microbiology

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Which eon would contain rocks with no fossils?  

A.  Archean B.  Hadean C.  Proterozoic D.  Phanerozoic

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Explain the hypersensitive response

What will be an ideal response?

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Turgor pressure in plant cells is

A. due in part to osmosis. B. a result of the walled cell being in a hypotonic environment. C. All of the answer choices are correct. D. the force of water against the inside of the cell wall. E. necessary to keep plants from wilting.

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Scientists at NIH are making progress in using stem-cells to cure

a. Parkinson’s disease. b. type 2 diabetes. c. sickle-cell anemia. d. bipolar disorder. e. anorexia.

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